<template>
  <el-container class="home_container">
    <el-header class="el-header"
      ><div>
        <img src="../assets/heima.png" alt="" />
        <span>后台管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
    </el-header>
    <el-container>
      <!-- 侧边栏 -->
      <el-aside :width="isCollapse ? '64px' : '200px'" class="el-aside">
        <!-- 折叠区域 -->
        <div class="toggle-button" @click="toggleCollapse">|||</div>
        <!-- 侧边栏菜单区域 -->
        <el-menu :router="true" :default-active="activePath" class="el-menu-vertical-demo" background-color="#313743" text-color="#fff" active-text-color="#3799ff" :unique-opened="true" :collapse="isCollapse" :collapse-transition="false">
          <!-- 一级菜单 -->
          <el-submenu :index="item.id + ''" v-for="item in menuList" :key="item.id">
            <!-- 一级菜单的模板区域 -->
            <template slot="title">
              <!-- 图标 -->
              <i :class="iconsObj[item.id]" style="margin-right: 10px"></i>
              <!-- 文本 -->
              <span>{{ item.authName }}</span>
            </template>
            <!-- 二级菜单 -->
            <el-menu-item :index="'/' + itemChildren.path" v-for="itemChildren in item.children" :key="itemChildren.id" @click="saveNavState('/' + itemChildren.path)">
              <template slot="title">
                <!-- 图标 -->
                <i class="el-icon-menu"></i>
                <!-- 文本 -->
                <span>{{ itemChildren.authName }}</span>
              </template>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
      <el-container>
        <el-main class="el-main">
          <router-view></router-view>
        </el-main>
      </el-container>
    </el-container>
  </el-container>
</template>

<script>
export default {
  data() {
    return {
      menuList: [],
      iconsObj: {
        125: 'iconfont icon-users',
        103: 'iconfont icon-tijikongjian',
        101: 'iconfont icon-shangpin',
        102: 'iconfont icon-danju',
        145: 'iconfont icon-baobiao',
      },
      isCollapse: false,
      activePath: '',
    }
  },
  created() {
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  methods: {
    logout() {
      window.sessionStorage.clear('token')
      this.$router.push('/login')
    },
    async getMenuList() {
      const { data: res } = await this.$http.get('menus')
      if (res.meta.status !== 200) return this.$message.error('获取菜单列表失败')
      else {
        this.menuList = res.data
      }
    },
    toggleCollapse() {
      this.isCollapse = !this.isCollapse
    },
    saveNavState(activePath) {
      window.sessionStorage.setItem('activePath', activePath)
      this.activePath = activePath
    },
  },
}
</script>

<style lang="less" scoped>
.home_container {
  height: 100%;
}
.el-header {
  background-color: #363d40;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-left: 0;
  color: #fff;
  font-size: 20px;
  > div {
    display: flex;
    align-items: center;

    span {
      margin-left: 15px;
    }
  }
}
.el-aside {
  background-color: #313743;
  .el-menu {
    border-right: none;
  }
}
.el-main() {
  background-color: #e9edf1;
}
.toggle-button {
  background-color: #4a5064;
  font-size: 10px;
  color: #fff;
  text-align: center;
  line-height: 24px;
  letter-spacing: 0.2em;
  cursor: pointer;
}
</style>
